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Re: [Xen-devel] [PATCH v3 1/9] xen: do not build backends for targets that do not support xen



On Fri, 17 Mar 2017, Paolo Bonzini wrote:
> On 16/03/2017 21:01, Stefano Stabellini wrote:
> > Change Makefile.objs to use CONFIG_XEN instead of CONFIG_XEN_BACKEND, so
> > that the Xen backends are only built for targets that support Xen.
> > 
> > Set CONFIG_XEN in the toplevel Makefile to ensure that files that are
> > built only once pick up Xen support properly.
> > 
> > Signed-off-by: Stefano Stabellini <stefano@xxxxxxxxxxx>
> > CC: groug@xxxxxxxx
> > CC: pbonzini@xxxxxxxxxx
> > CC: peter.maydell@xxxxxxxxxx
> > CC: rth@xxxxxxxxxxx
> > CC: stefanha@xxxxxxxxxx
> > ---
> >  Makefile                 | 1 +
> >  hw/block/Makefile.objs   | 2 +-
> >  hw/char/Makefile.objs    | 2 +-
> >  hw/display/Makefile.objs | 2 +-
> >  hw/net/Makefile.objs     | 2 +-
> >  hw/usb/Makefile.objs     | 2 +-
> >  hw/xen/Makefile.objs     | 2 +-
> >  7 files changed, 7 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Makefile b/Makefile
> > index 1c4c04f..b246138 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -26,6 +26,7 @@ endif
> >  
> >  CONFIG_SOFTMMU := $(if $(filter %-softmmu,$(TARGET_DIRS)),y)
> >  CONFIG_USER_ONLY := $(if $(filter %-user,$(TARGET_DIRS)),y)
> > +CONFIG_XEN := $(CONFIG_XEN_BACKEND)
> >  CONFIG_ALL=y
> >  -include config-all-devices.mak
> >  -include config-all-disas.mak
> > diff --git a/hw/block/Makefile.objs b/hw/block/Makefile.objs
> > index d4c3ab7..e0ed980 100644
> > --- a/hw/block/Makefile.objs
> > +++ b/hw/block/Makefile.objs
> > @@ -4,7 +4,7 @@ common-obj-$(CONFIG_SSI_M25P80) += m25p80.o
> >  common-obj-$(CONFIG_NAND) += nand.o
> >  common-obj-$(CONFIG_PFLASH_CFI01) += pflash_cfi01.o
> >  common-obj-$(CONFIG_PFLASH_CFI02) += pflash_cfi02.o
> > -common-obj-$(CONFIG_XEN_BACKEND) += xen_disk.o
> > +common-obj-$(CONFIG_XEN) += xen_disk.o
> >  common-obj-$(CONFIG_ECC) += ecc.o
> >  common-obj-$(CONFIG_ONENAND) += onenand.o
> >  common-obj-$(CONFIG_NVME_PCI) += nvme.o
> > diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs
> > index 6ea76fe..725fdc4 100644
> > --- a/hw/char/Makefile.objs
> > +++ b/hw/char/Makefile.objs
> > @@ -7,7 +7,7 @@ common-obj-$(CONFIG_SERIAL_ISA) += serial-isa.o
> >  common-obj-$(CONFIG_SERIAL_PCI) += serial-pci.o
> >  common-obj-$(CONFIG_VIRTIO) += virtio-console.o
> >  common-obj-$(CONFIG_XILINX) += xilinx_uartlite.o
> > -common-obj-$(CONFIG_XEN_BACKEND) += xen_console.o
> > +common-obj-$(CONFIG_XEN) += xen_console.o
> >  common-obj-$(CONFIG_CADENCE) += cadence_uart.o
> >  
> >  obj-$(CONFIG_EXYNOS4) += exynos4210_uart.o
> > diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
> > index 063889b..3d02e8b 100644
> > --- a/hw/display/Makefile.objs
> > +++ b/hw/display/Makefile.objs
> > @@ -5,7 +5,7 @@ common-obj-$(CONFIG_JAZZ_LED) += jazz_led.o
> >  common-obj-$(CONFIG_PL110) += pl110.o
> >  common-obj-$(CONFIG_SSD0303) += ssd0303.o
> >  common-obj-$(CONFIG_SSD0323) += ssd0323.o
> > -common-obj-$(CONFIG_XEN_BACKEND) += xenfb.o
> > +common-obj-$(CONFIG_XEN) += xenfb.o
> >  
> >  common-obj-$(CONFIG_VGA_PCI) += vga-pci.o
> >  common-obj-$(CONFIG_VGA_ISA) += vga-isa.o
> > diff --git a/hw/net/Makefile.objs b/hw/net/Makefile.objs
> > index 610ed3e..6a95d92 100644
> > --- a/hw/net/Makefile.objs
> > +++ b/hw/net/Makefile.objs
> > @@ -1,5 +1,5 @@
> >  common-obj-$(CONFIG_DP8393X) += dp8393x.o
> > -common-obj-$(CONFIG_XEN_BACKEND) += xen_nic.o
> > +common-obj-$(CONFIG_XEN) += xen_nic.o
> >  
> >  # PCI network cards
> >  common-obj-$(CONFIG_NE2000_PCI) += ne2000.o
> > diff --git a/hw/usb/Makefile.objs b/hw/usb/Makefile.objs
> > index 98b5c9d..5958be8 100644
> > --- a/hw/usb/Makefile.objs
> > +++ b/hw/usb/Makefile.objs
> > @@ -40,5 +40,5 @@ common-obj-$(CONFIG_USB_REDIR) += redirect.o quirks.o
> >  common-obj-y += $(patsubst %,host-%.o,$(HOST_USB))
> >  
> >  ifeq ($(CONFIG_USB_LIBUSB),y)
> > -common-obj-$(CONFIG_XEN_BACKEND) += xen-usb.o
> > +common-obj-$(CONFIG_XEN) += xen-usb.o
> >  endif
> > diff --git a/hw/xen/Makefile.objs b/hw/xen/Makefile.objs
> > index 591cdc2..4be3ec9 100644
> > --- a/hw/xen/Makefile.objs
> > +++ b/hw/xen/Makefile.objs
> > @@ -1,5 +1,5 @@
> >  # xen backend driver support
> > -common-obj-$(CONFIG_XEN_BACKEND) += xen_backend.o xen_devconfig.o 
> > xen_pvdev.o
> > +common-obj-$(CONFIG_XEN) += xen_backend.o xen_devconfig.o xen_pvdev.o
> >  
> >  obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
> >  obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o 
> > xen_pt_graphics.o xen_pt_msi.o
> > 
> 
> I'm queuing this for 2.9 as a bugfix, adding Xen things to various
> softcore emulators makes no sense.

Thank you, and I agree!

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